Debt Snowball vs. Debt Avalanche: Which Pays Off Debt Faster?
If you have more than one debt, you've probably run into the great debate: should you pay off the smallest balance first (the snowball) or the highest interest rate first (the avalanche)?
Both methods work the same way mechanically. You pay the minimum on everything, put every extra dollar toward one "focus" debt, and when that debt is gone, you roll its payment into the next one. The only difference is the order.
The debt snowball
Order your debts from smallest balance to largest, ignoring interest rates.
Why people like it: you knock out a debt quickly, sometimes in the first month or two. Each paid-off account is a visible win and one less bill to track. For a lot of people, that momentum is the difference between sticking with a plan and giving up.
The trade-off: if a large balance has a high rate, it keeps charging interest while you work on the small ones.
The debt avalanche
Order your debts from highest interest rate to lowest, ignoring balances.
Why people like it: mathematically, it almost always costs the least in total interest. Every extra dollar goes where it's being charged the most.
The trade-off: if your highest-rate debt is also a big one, it can take a long time before you see your first account hit zero.
We ran the numbers
Here's a realistic example: a household with five debts totaling $33,690 and $675 a month in minimum payments.
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Credit card A | $2,600 | 24.99% | $85 |
| Credit card B | $830 | 21.99% | $35 |
| Car loan | $11,100 | 6.9% | $310 |
| Student loan | $18,260 | 5.5% | $195 |
| Medical bill | $900 | 0% | $50 |
They find an extra $200 a month to put toward debt, for a total of $875 a month. Here's what happens under each approach, rolling payments forward as each debt is paid off:
| Approach | Debt-free in | Total interest paid |
|---|---|---|
| Minimums only | 123 months (over 10 years) | $8,862 |
| Snowball, +$200/month | 44 months | $4,202 |
| Avalanche, +$200/month | 44 months | $4,082 |
Calculated with the Debt Payoff Planner in the Squared Roots Money Toolkit, assuming fixed rates, monthly compounding and no new charges.
Three things jump out:
- Having a plan is the big win. Either method cuts more than six years and about $4,700 in interest compared with paying minimums.
- The difference between the two methods is small. In this example, the avalanche saves about $120 over nearly four years. That's roughly $3 a month.
- The snowball gets the first win in month 4, when Credit card B is gone. The avalanche's first payoff comes in month 11.
Your numbers will be different. The gap between methods grows when you have a large balance with a very high rate. But in most households we see, the difference is modest.
So which should you choose?
Choose the snowball if: - you've tried to pay off debt before and lost steam - you have several small balances you could clear quickly - having fewer bills to track would lower your stress
Choose the avalanche if: - you're motivated by the math and the total interest number - your highest-rate debt is also one of your smaller balances (then it's both methods at once) - you have one large, high-rate balance, like a big credit card at 25% or more
Or blend them. Some people clear one tiny balance first for a quick win, then switch to the avalanche. That's a perfectly good plan.
The honest answer: the best method is the one you'll stick with. A slightly "worse" plan you follow for four years beats a perfect plan you abandon in month three.
Before you start: make the debt cheaper
Whichever method you choose, it helps to lower the cost of the debt itself:
- Ask your card issuer for a lower APR. If you've paid on time, it's a five-minute call, and the worst they can say is no.
- Ask about hardship programs if you're struggling to make minimums.
- For medical bills, request an itemized bill, ask about the provider's financial assistance policy, and ask for a no-interest payment plan.
- Stop adding new charges. Payoff plans only work if the balances stop growing. That's why we recommend a starter emergency fund before you go all-in on debt.
Run your own numbers
The Squared Roots Money Toolkit includes the exact Debt Payoff Planner used for this example. Enter up to eight debts and your extra payment, and it shows your debt-free date and total interest under the snowball, the avalanche and minimums only, side by side. Get the toolkit.